/Engine/Source/Runtime/CoreUObject/Public/UObject/Package.h
Delegate type for when a package is marked as dirty via UObjectBaseUtilty::MarkPackageDirty ( Params: UPackage* ModifiedPackage, bool bWasDirty )
typedef TMulticastDelegate_TwoParams< void, class [UPackage](API\Runtime\CoreUObject\UObject\UPackage) *, bool > FOnPackageMarkedDirty